Band-type fan structure

ABSTRACT

A band-type fan structure includes a transmission band body and multiple blades. The multiple blades are side by side disposed on the transmission band body along the surface of the transmission band body in parallel to each other. Each two adjacent blades define therebetween a flow way. When the transmission band body is continuously reciprocally moved, the blades are driven by the transmission band body to continuously reciprocally move to disturb the air in the flow ways so as to produce an air volume.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a Continuation-in-Part of U.S. patent application Ser. No. 13/670,459, filed on Nov. 7, 2012, titled Band-Type Fan Structure, listing Bor-Haw Chang and Liang-Ji Chang as inventors, herein incorporated by reference in its entirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to a band-type fan structure, and more particularly to a band-type fan structure, which has a greatly minified volume. Also, the band-type fan structure improves the shortcoming of unstable operation of the conventional fan due to deflection of the blades.

2. Description of the Related Art

Along with the continuous advance of electronic technologies and industries, the density of transistors of various chips (such as central processor and execution unit) has been more and more increased. This enables the central processor to process data at higher and higher speed. However, the power consumption and heat generated by the central processor have also become higher and higher. In order to keep the central processor stably operating, it has become an important topic how to develop high-efficiency heat dissipation unit for dissipating the heat generated by the central processor.

In order to keep a high-efficiency heat dissipation function, the heat dissipation unit has inevitably become larger and larger and heavier and heavier. However, in design of electronic device such as laptop, tablet, intelligent mobile phone and intelligent handheld electronic device, the limitation of space is always a greatest bottleneck of the design process.

Please refer to FIG. 1, which is a perspective assembled view of a conventional fan module 1. The fan module 1 includes a centrifugal fan 10, a heat pipe 11 and a heat dissipation unit 12. The centrifugal fan 10 serves to drive air to flow so as to carry away the heat of the heat dissipation unit 12 and lower the temperature. The performance of the fan module 1 is determined by the wind pressure and air volume of the centrifugal fan 10 and the heat exchange area of the heat dissipation unit. The larger the heat exchange area of the heat dissipation unit 12 is, for example, the longer the radiating fin is, the better the heat dissipation effect of the heat dissipation unit 12 is. However, the increase of the length of the radiating fin will lead to excessively large total volume of the fan module. This fails to meet the requirements for lightweight, slimness and miniaturization of the laptop.

In order to meet the requirements for lightweight, slimness and miniaturization, the respective components are as minified as possible. Therefore, the centrifugal fan is miniaturized. However, due to the miniaturization of the volume, the blades of the miniaturized centrifugal fan are very thin and have a large area. As a result, the blades are easy to deflect to cause more vibrations and make louder noise.

According to the above, the conventional fan module has the following shortcomings:

1. The volume is larger.

2. The blades tend to deflect to cause unstable operation.

SUMMARY OF THE INVENTION

It is therefore a primary object of the present invention to provide a band-type fan structure, which has a greatly minified volume.

It is a further object of the present invention to provide the above band-type fan structure, which improves the shortcoming of unstable operation of the conventional fan due to deflection of the blades.

To achieve the above and other objects, the band-type fan structure of the present invention includes a transmission band body and multiple blades. The transmission band body is an elongated band body. The blades are side by side disposed on the transmission band body in parallel to each other. Each blade has a main body disposed on a surface of the transmission band body and a first end outward extending from the main body and protruding from the transmission band body. Each two adjacent blades define therebetween a flow way. When the transmission band body is continuously reciprocally moved, the blades are driven by the transmission band body to continuously reciprocally move.

In the above band-type fan structure, the main bodies of the blades are disposed on the surface of the transmission band body with the first ends of the blades protruding from the transmission band body. A power member is electrically connected to the transmission band body. When the power member is turned on, the power member drives the transmission band body to continuously linearly reciprocally move, whereby the blades are driven by the transmission band body to continuously reciprocally move. Under such circumstance, the air originally stationary in the flow ways is disturbed by the blades driven by the continuously reciprocally moved transmission band body to create airflow. The airflow will be continuously compressed between the blades driven by the transmission band body to flow to the first ends to produce an air volume. Therefore, by means of moving the flow ways and the blades relative to each other, the surrounding airflow is changed to produce the air volume. Accordingly, the band-type fan has a greatly minified volume and can be used instead of the conventional fan, which has an excessively large total volume. Moreover, the band-type fan structure improves the shortcoming of unstable operation of the conventional fan due to deflection of the blades.

BRIEF DESCRIPTION OF THE DRAWINGS

The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:

FIG. 1 is a perspective assembled view of a conventional fan structure;

FIG. 2A is a perspective exploded view of a first embodiment of the band-type fan structure of the present invention;

FIG. 2B is a perspective assembled view of the first embodiment of the band-type fan structure of the present invention;

FIG. 3A is a perspective exploded view of the first embodiment of the band-type fan structure of the present invention;

FIG. 3B is a perspective assembled view of the first embodiment of the band-type fan structure of the present invention;

FIG. 4A is a perspective exploded view of a second embodiment of the band-type fan structure of the present invention;

FIG. 4B is a perspective assembled view of the second embodiment of the band-type fan structure of the present invention;

FIG. 4C is a perspective view of the second embodiment of the band-type fan structure of the present invention, showing the operation thereof;

FIG. 5 is a perspective view of a third embodiment of the band-type fan structure of the present invention; and

FIG. 6 is a perspective assembled view of a fourth embodiment of the band-type fan structure of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to FIGS. 2A and 2B. FIG. 2A is a perspective exploded view of a first embodiment of the band-type fan structure of the present invention. FIG. 2B is a perspective assembled view of the first embodiment of the band-type fan structure of the present invention. According to the first embodiment, the band-type fan structure of the present invention includes a transmission band body 20 and multiple blades 21. The transmission band body 20 is an elongated band body. The blades 21 are side by side disposed on the transmission band body 20 along the transmission band body 20 in parallel to each other. Each two adjacent blades 21 define therebetween a flow way 215. Each blade 21 has a main body 211 disposed on a surface 203 of the transmission band body 20 and a first end 213 outward extending from the main body 211 and protruding from the transmission band body 20.

In this embodiment, the blade 21 has a wing-shaped configuration. The wing-shaped configuration has an aerodynamic property that the shape of the blade 21 can change the direction of the force, for example, change a horizontal force into lifting force or change a horizontal rotational torque into a vertical push force.

In addition, the first end 213 of the blade 21 can be made of a flexible material. Due to the property of the flexible material, when the transmission band body 20 is continuously linearly reciprocally moved, the swing amplitude of the first end 213 of the blade 21 is larger than that of the blade 21 made of common inflexible material. In this case, the air volume produced is consequentially relatively larger.

Therefore, when the transmission band body 20 is continuously linearly reciprocally moved, the blades 21 are driven by the transmission band body 20 to continuously reciprocally move. Under such circumstance, the air originally stationary in the flow ways is disturbed by the blades 21 driven by the continuously reciprocally moved transmission band body 20 to create airflow. The airflow will be continuously compressed between the blades 21 driven by the transmission band body 20 to flow to the first ends to produce an air volume. Therefore, by means of moving the blades and the flow ways relative to each other, the surrounding airflow is changed to produce the air volume. Accordingly, the band-type fan has a greatly minified volume and can be used instead of the conventional fan, which has an excessively large total volume. Moreover, the band-type fan structure improves the shortcoming of unstable operation of the conventional fan due to deflection of the blades.

Further referring to FIGS. 3A and 3B as well as FIG. 2B, the band-type fan structure further includes a case 22 having at least one bottom board 221 and two sidewalls 222 disposed on two opposite sides of the bottom board 221. The bottom board 221 and the sidewalls 222 together define a receiving space 223 for receiving the transmission band body 20 and the blades 21. The receiving space 223 communicates with the flow ways 214 between the blades 21.

Please now refer to FIGS. 4A, 4B and 4C. FIG. 4A is a perspective exploded view of a second embodiment of the band-type fan structure of the present invention. FIG. 4B is a perspective assembled view of the second embodiment of the band-type fan structure of the present invention. FIG. 4C is a perspective view of the second embodiment of the band-type fan structure of the present invention, showing the operation thereof. The second embodiment is partially identical to the first embodiment in component and relationship between the components and thus will not be repeatedly described hereinafter. The second embodiment is mainly different from the first embodiment in that the surface 203 of the transmission band body 20 has multiple connected sections 204. One face of the main body 211 of the blade 21, which face is proximal to the transmission band body 20, is connected with the connected section 204. The connected section 204 is an insertion hole or a threaded hole. A connection section of the main body 211 corresponding to the connected section 204 is an insertion pin or a screw. The connected section 204 is connected with the main body 211 by means of insertion or screwing.

The transmission band body 20 further defines a passageway 205 in communication with the connected sections 204. The band-type fan structure further includes a power member 3 electrically connected to the transmission band body 20, whereby the blades 21 can be driven by the transmission band body 20 to continuously reciprocally move. The power member 3 has at least one transmission shaft 31 and a power source 32. The transmission shaft 31 is positioned on two sides of the passageway 205 and connected with the power source 32.

Please now refer to FIGS. 5 and 4A. FIG. 5 is a perspective view of a third embodiment of the band-type fan structure of the present invention. The third embodiment is partially identical to the first embodiment in component and relationship between the components and thus will not be repeatedly described hereinafter. The third embodiment is mainly different from the first embodiment in that the blade 21 further has a second end 214 extending from the main body 211 in a direction opposite to the first end 213 and protruding from the transmission band body 20. One of the first and second ends 213, 214 of the blade 21 or both of the first and second ends 213, 214 of the blade 21 are made of flexible material.

Please now refer to FIG. 6, which is a perspective assembled view of a fourth embodiment of the band-type fan structure of the present invention. The fourth embodiment is partially identical to the first embodiment in component and relationship between the components and thus will not be repeatedly described hereinafter. The fourth embodiment is mainly different from the first embodiment in that the band-type fan structure includes multiple transmission band bodies 20 and multiple blades 21 disposed on the transmission band bodies 20. The transmission band bodies 20 are serially connected with each other to form a large-size band-type fan structure. This can achieve the same effect as the above embodiments.

In conclusion, in comparison with the conventional fan structure, the present invention has the following advantages:

1. The volume of the fan structure is greatly reduced.

2. The shortcoming of unstable operation of the conventional fan structure due to deflection of the blades is improved.

The present invention has been described with the above embodiments thereof and it is understood that many changes and modifications in the above embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims. 

What is claimed is:
 1. A band-type fan structure comprising: a transmission band body, which is an elongated band body; and multiple blades side by side disposed on the transmission band body along the transmission band body in parallel to each other, each two adjacent blades defining therebetween a flow way, when the transmission band body is continuously linearly reciprocally moved, the blades being driven by the transmission band body to continuously reciprocally move.
 2. A band-type fan structure comprising: a transmission band body, which is an elongated band body; multiple blades side by side disposed on the transmission band body along the transmission band body in parallel to each other, each blade having a main body disposed on a surface of the transmission band body and a first end extending from the main body and protruding from the transmission band body, each two adjacent blades defining therebetween a flow way; and a power member electrically connected to the transmission band body for making the transmission band body continuously linearly reciprocally move, whereby the blades are driven by the transmission band body to continuously reciprocally move.
 3. The band-type fan structure as claimed in claim 2, further comprising a case having at least one bottom board and two sidewalls disposed on two opposite sides of the bottom board, the bottom board and the sidewalls together defining a receiving space for receiving the transmission band body and the blades, the receiving space communicating with the flow ways between the blades.
 4. The band-type fan structure as claimed in claim 3, wherein the surface of the transmission band body has multiple connected sections, one face of the main body of the blade, which face is proximal to the transmission band body, is connected with the connected section.
 5. The band-type fan structure as claimed in claim 4, wherein the connected section is an insertion hole or a threaded hole and is an insertion pin or a screw, a connection section of the main body corresponding to the connected section being an insertion pin or a screw, the connected section being connected with the main body by means of insertion or screwing.
 6. The band-type fan structure as claimed in claim 1, wherein the blades are wing-shaped.
 7. The band-type fan structure as claimed in claim 1, wherein the blade further has a second end extending from the main body in a direction opposite to the first end and protruding from the transmission band body.
 8. The band-type fan structure as claimed in claim 1, wherein the first ends of the blades are made of flexible material.
 9. The band-type fan structure as claimed in claim 2, wherein the first ends of the blades are made of flexible material.
 10. The band-type fan structure as claimed in claim 7, wherein the second ends of the blades are made of flexible material or both the first and second ends of the blades are made of flexible material.
 11. The band-type fan structure as claimed in claim 5, wherein the transmission band body further defines a passageway in communication with the connected sections.
 12. The band-type fan structure as claimed in claim 2, wherein the power member has multiple transmission shafts and a power source, the transmission shafts being positioned on two sides of the passageway and connected with the power source. 